براغي HOLO-KROME 32034 #5-40 X 1/8" ذات نقطة كوبية بمقبس سداسي | فولاذ سبائكي مؤكسد حراري أسود (100 / عبوة)

I was relieved how precisely these set screws lock into place without stripping; the hex socket drive gives a clean grip every time. Used them to secure a small gear on a shaft, and the thermal black oxide finish seems tougher than the plain steel ones I had before.

The cup point digs in exactly where I need it, and the black oxide finish hasn't shown a hint of rust after a month in my damp shop. These #5-40s hold position on a shaft without backing off, which is all I ask from a set screw.

They fit perfectly in the tapped holes for a small project I was working on, and the black oxide finish looks good and seems durable. The cup point grips the shaft tightly without any slipping.